Appellplatz

Prisoners lined up for roll call at Sachsenhausen concentration camp, 1941
Roll call at Melk concentration camp [de]
Appellplatz at Dachau concentration camp, 2007

Appellplatz (often spelt appelplatz) is a compound German word meaning "roll call area": (Appell + Platz). In English, the word is generally used to describe the location for the daily roll calls in Nazi concentration camps.